9 month old aggressive pig

Question
I have had my 9 month old pig for 3 months and the first two months were great. he sat on my lap and would snuggle. He litter trained immediately and had no accidents in the house and would stay in the baby gate we keep him in when we aren't home. He is neutered and was showing no sign of sexual aggression.

Now he is breaking out of his gate, biting, humping things and ejaculating, knocking over anything that will move, opening drawers and pulling everything out of them, he has eaten all of my plants. He has outsmarted all of the baby safety products I have bought to try and prevent this. He is only 17 lbs and my house is a disaster. He has now been peeing on the carpet. Sometime as we are looking at him and telling him no. And I feel like he doesn't even like me anymore. He just nudges me and jumps on me all the time. He wont sit on my lap without getting aggressive. I guess hes trying to mount me. I don't know what to do with him. I'm already attached to him hes so cute. How do I fix this? I just can't imagine him getting bigger and the damage he will do then. He's already so strong. Please help!

Answer
Sexual aggression in a "neutered" male usually means the pig has an undescended testicle, or chyptorchid. If his tusks are rapidly growing large, chances are he's chryptorchid. Normally, a neutered male pigs tusks grow very slowly, poking out past the lip at age 2 to 2-1/2. Another clue is odor. Intact males have a distinct scent that female pigs love, but most people find unappealing. If your pig has large tusks for a neutered male his age and a distinct boar smell, he's probably chryptorchid.

You might want to talk to the vet who neutered your pig. Ask if they found and removed both testicles, and how old the pig was when it was done.

Your vet can test the hormone levels in piggys blood. If there is an undescended testicle, it will have to be removed. The surgery is more invasive than a simple neuter. There's a list of vets that see pot-bellied pigs here http://www.9sites.com/Pig~placements.htm

A strict training program might help a little now and a lot more after any stray testicles are removed. Give him lots of toys and lots of outside time. Work on trick and harness training.

Go back to square 1 with potty training, taking him outside or to his box as soon as he wakes up, before and after meals, and every couple of hours. Do not let him leave the box or come back inside until he goes potty. Wash the problem area on the carpet with a product designed to remove pet odors, and arrange the room so he can't reach the problem spot, or physically keep him away from it. For example do not let him in the room unless he's on a harness and leash, and keep him away from the potty spot.

I highly recommend Priscilla Valentines book Pot-Bellied Pig Behavior and Training. Pris really understands how pigs think. She goes into potty training and destructive behavior in much more detail than I can here. Her book is available from Amazon.com